Calculating machine



5 Sheets-Sheet l G. LERCH Filed June 28, 1932 Feb. 28, 1939.

CALCULATING MACHINE ill! Illlllllll 5 Sheets-Sheet 2 im mmwrmm ww@ ,ummm @Rw G. LERCH CAL'CULATING MACHNE Filed June 28, 1932 Feb. 28, 1939.

2M/f 'f ATTORNEY lulllilil n lllllllllllllll Feb. 28, 1939. G, I r-:RCH

CALCULATING MACHINE 1932 5 Sheets-5heet 3 Filed June 28,

FJJE E ATTORNEY Feb. 28, 1939.l

G. LERCH CALCULATING MACHINE Filed June 28, 1932 5 Sheets-Sheet 4 FLE E5 INVENTOR. 654/572 V Z enc/1 n BY ATTO NEY Feb. 28, 1939. G, LERCH CALCULATING MACHINE Filed June 28, 1932 5 Sheets-Sheet 5 A TTORNE Y /Illllllllllllil Patentedl Feb. 28, 1939 CALCULATING MACHINE Gustav Lerch, Oakland, Calif., assignor to Marchant Calculating Machine Company, a. corporation of California Application June 28, 1932, Serial N0. 619,645

27 Claims.

'I'he present invention relates to calculating machines of the type adapted to perform the four cardinal calculations and combinations thereof, and particularly to the type in which the transmission mechanism is controlled by a plurality of operation-controlling devices to initiate various calculations of one or more cycles of operation. The invention is concerned more particularly with auxiliary power operated means by which the various operation control devices are set and the main clutch is engaged.

It is an object of the invention to provide oper- I ation controlling mechanism which is moved to operative position by auxiliary power driven mechanism upon movement of the control devices or keys to operative position.

Another object of the invention is the provision of an auxiliary clutch the operation of which is indicated by any one of a plurality of manually operable controlling devices to selectively engage and set the various machine function controls to operative position.

Another object of the invention is the pro- Vision of an auxiliary clutch adapted to determine 2,3 engagement of the main clutch and to set the various auxiliary controlling mechanisms.

Another object of the invention is the provision of power driven means for transferring a keyboard selection into the actuator.

of power driven means for locking the selection in the actuator.

Another object of the invention is the provision of power driven means for setting a multiplier selection into the multiplier control unit under the control of a plurality of multiplier selection keys.

Another object of the invention is the provision of an auxiliary clutch which is adapted to determine engagement of the main actuating clutch upon operation of any operation determining key.

is `of the general type shown in the patent to- Friden, Number 1,643,710 dated September 27, 1927, to which reference is hereby made for a disclosure of a complete calculating machine including mechanism not specifically described herein.

Another object ofthe invention is the provision I (CL zas- 62) It is to be understood, however, that although the invention is shown applied to a machine of the general type disclosed in this patent, it is manifest that the invention is applicable in any machine which is power driven and in which var- 5 ious controlling mechanisms must be set at the beginning of a selecting operation.

The invention possesses a plurality of advantageous features, some of which will be set forth in full in the following description, and while the 10 preferred .construction thereof is shown in the drawings accompanying the description, it is understood that the invention is capable of modiiication within the scope of the appended claims.

In the accompanying drawings:

Figure 1 is a left side elevation showing the numeral keys, the selection mechanism controlled thereby, the actuator, and the locking mechanism whereby the selection set into the actuator is locked therein.

Figure 2 is a right side elevation showing the plus and minus keys and the mechanism which positions the reversing gearing control.

Figure 3 is a detail view showing the means for engaging the auxiliary clutch upon operation of 25 any operation initiating member.

Figure 4 is a detail view showing the means whereby the auxiliary clutch operates to set various control mechanisms.

Figure 5 is a detail view showing the mecha- 30 nism for controlling engagement of the main actuating clutch.

Figure 6 is a partial plan View showing the actuator and the driving mechanism therefor.

Figure 7 is a section taken on the line l-l in 35 Figure 6.

Figure 8 is a longitudinal section through the multiplier mechanism showing the multiplier selection mechanism and the multiplier control unit.

Figure 9 is a detail view of the latching slide for maintaining a, multiplier key in depressed position for a. predetermined number of operating cycles.

DRIVING MECHANISM 45 The machine is provided with a motor (not shown) which drives shaft |00 (Figures 2 and 6), the driveA from said shaft being transmitted by suitable gearing to drive shaft IUI. Mounted on 5o said drive shaft is a ratchet wheel I I I (Figure 7) which constitutes the driving member of the main clutch IIIJ. Also secured to said drive shaft IDI is asecond ratchet wheel IlI which constitutes the driving member of the auxiliary `clutch |12.

'The specific constructions of said clutches are identical and are fully disclosed in the aforementioned patent to Friden to which reference is hereby made for a complete disclosure of the same. For the purposes'of the instant description, it is sufcient to understand that in this type of clutch the clutch housing constitutes the driven member and that the engagement of the clutch is controlled by a bellcrank which is adapted to be engaged or disengaged fromthe clutch housing, `thereby controlling movement of a pawl adapted to connect the housing and the ratchet wheel to effect the drive. As shown in Figure 5 the engagement of the main clutch |||l is controlled by a bellcrank ||5 which is pivoted at |6 and is urged into clutch disengaging position by the spring H8. As shown in Figure 3, a similar bellcrank |13 controls engagement of the auxiliary clutch |12, said bellcrank being pivoted at |14 and urged into clutch disengaging position by spring |15 tensioned between the tail of said bellcrank and an ear on the base plate. The mechanism for controlling the engagement and disengagement of the respective clutches will be more fully described hereinafter.

Suitable reversing gearing is interposed between the clutch ||0 and the actuator 300. Gears |3| and |33 (Figures 6 and 7) serve to transmit rotation from the clutch housing to the actuator according to the desired direction of rotation. The gear |3| drives through gear |31, shaft |38, gears |39 and |40 to rotate said actuator in the additive direction, while the gear |33 drives through gears |36, |31, shaft |38, gears |38 and |40 to rotate said actuator in the subtractive direction. The drive from the clutch housing to the respective gear is transmitted by a pin |34 (Figure 1) which is secured to a shaft |35 and is shiftable into a seat in either ofthe respective gears |3| and |33. 'I'he '"'ends of said pin extend through slots in a collar formed integrally with the clutch housing ||0 into the seat of the gear with which the .pin is aligned. A suitable shifting fork |43 is provided forshifting said pin from the seat in one gear to the seat in the other, said pin being normally disposed within the seat of the gear |8| in position to drive said actuator in an additive direction. lThe Y, controlling mechanism whereby fork |43 is shifted to shift pin |34 to determine subtractive o r additive actuation, will be described hereinafter under the heading of Reversing mechanism control.

AUXILIARY CLUTCH AND AssoorArEn MECHANISM Control mechanism respect thereto due to the engagement of pin |18 on lever |18 with slot |16B formed in the upper arm of `vlever 16. Spring, |160 tensioned between furthermost clockwise position with-respect to tensioned between lever |18 and a stud on an intermediate supporting plate. Control plate |20 `fis rocked in a clockwise direction upon operation of any operationlinitiating key and the arrangetothe housing of clutch ||0. Upon release of the 7 anarco ment is such that roller |25 oscillates lever |18 which, by means of lever |15, rocks the clutch release bellcrank |13 to clutch engaging position.

Means are provided whereby the auxiliary clutch is engaged for a single rotation only; said means comprises a pin |12A integral with the clutch housing which, during the rst rotation of said clutch, strikes the under side of the upper arm of lever |16, rocking said lever against the tension of spring |160 to disengage nose |18A from the tail |13A of the bellcrank |13. Spring |15 then becomes effective to press the nose on said bellcrank against the clutch housing until the end of the rotation when it enters the notch therein, thereby serving to disengage the clutch. From the foregoing it is evident that the auxiliary clutch |12 is engaged for a single rotation upon operation of any control key.

Means are provided whereby operation of the auxiliary clutch sets all the various control mechanisms necessary for an operation and engages the main clutch. Secured to the clutch housing of clutch |12 is a cam i8! which is adapted, upon rotation of said clutch housing, to oscillate a bellcrank |82 loosely mounted on shaft |14 (Figure 4) against the tension of spring |82A secured to the forward arm of said bellcrank and a pin on the base plate. The forward arm of said bellcrank is slotted at |823 to receive a pin |83A on the rearward end of a link |83, the forward end of said link being secured to an arm |84, the lower end of which is secured to shaft |85, said shaft being disposed within the tubular shaft |23. The arrangement is such that clockwise oscillation of bellcrank |82 moves link |83 rearwardly and oscillates arm |84 and shaft |85 in a clockwise direction, such oscillation being used to perform various functions, as will be hereinafter set forth.

Means are provided whereby the clockwise oscillation of link |83 and 'arm |84 serves to engage the main clutch. As shown in Figure 5, a link |2| is pivoted at its forward end to arm |84 and is notched at its rearward end to engage a pin ||9 on the clutch release bellcrank ||5 so that rearward movement of link |2| results in oscillation of clutch release bellcrank |5 to clutch engaging position. It is to be noted that thenotchin member |2| is of sumcient width to provide a certain amount of lost motion beween link |2| and the clutch release bellcrank 5 in order to provide ample time for the setting of other mechanisms before engagement of the main clutch.

Means are provided for latohing the main clutch of the operation ydetermined by the operated control means. Said means comprises a latohing member |86 pivoted at |81, a lateral extension |86A on the upper arm thereof being adapted to* drop behind lateral extension |83B on link |83 under the inuence-of-'spring |86B when said link is moved rearwardly. l

Means are provided for disabling the scribed latching means at the conclusion ofthe 'operation determined by the operatedy control key. Roller 25A on control plate |20 (Figures and 5)- overlies the forward arm of a` lever |88 `which is -pivoted onvshaft |18`C by means of an elongated slot as shown and which is provided .with a knose |88A at the rearward end thereof which is held in engagement with a single'ht'ootl gear any control key,` member I 88 is rocked by roller |25A to removethe nose |88A`ther`eof from the path of the single tooth gear`|89which is secured -above del engaging means in active position until the end 89 by a spring |880. -Upon operation of 1 operated control key spring |88C becomes effective to move nose |88A into the path of the tooth on gear |89 which imparts a rearward movement to member |88 whereby a pin |88B secured thereto and lying immediately forward of the lower arm of latching member |86 (Figures 4 and 5), rocks said latching member to inoperative position. Thus link |83 and arm |84 are released at the end of any operation of the machine and are permitted to return to normal position under the tension of springs |82A and |84A (Figure 4). whereby bellcrank ||5 is moved by its spring ||8 to main clutch disengaging position to stop the actuator 300.

Plus and minus keys Manually operablemeans are provided for determining any desired number of positive or negative actuations of the accumulating mechanism by the actuating mechanism. The means for initiating positive actuation comprises the plus key 200 (Figure 2) which is mounted for rearward and downward movement on parallel links 20|, being held in raised position by a spring 202 tensioned between a stud on said key and the supporting plate 2 I0. The frame 203 carries a roller 205 which extends through an aperture in the plate 2|0 and abuts the forward vertical arm |24 of control plate 20. Due to the manner in which the frame is mounted on the parallel links, depression of the plus key causes the roller to be moved downwardly and to the rear, rocking the control plate in a clockwise direction 'to effect engagement of the auxiliary clutch in the manner described above.

'I'he manual `means vfor controlling reverse engagement of the drive for any desired number of actuations comprises a minus bar 220 slidably mounted on the intermediate plate 2|0 by means of pin and slot connection 22| and normally maintained in elevated position by spring 222 which underlies the stud 220A on said bar 220. Said bar carries near its lower end a pin 220B which extends through an aperture in the plate 2 I0 and overlies a bellcrank 225 (Figure 2) which is prorvided on its forward arm with a roller 223 overlying the rearward inclined arm |25 of control plate |20. The arrangement is such that depression of the minu` key 220 causes clockwise oscillation of control plate |20 to engage the auxiliary clutch in the manner described above. nus key 220 also acts, through the bellcrank 225, to determine subtractive rotation of the actuator in the manner set forth hereinafter under the heading of Reversing mechanism control.

Automatic multiplication after to be positioned beneath a nose 135A on said slide to maintain the key in depressed position during thel operation determined thereby. The key 130A at the forward end of the bank of keys 130 is a clearance key and its function is tomove the slide '|35 to cause the release of any key '|30 which may be held depressed.

Means are provided whereby depression of any Said mimultiplier-key sets a value into the multiplier control unit corresponding to the value of the depressed key. Each key stem 13| is provided with a laterally extending pin 138 which overlies a camming notch in the differential bar 140 which is slidably mounted on the plate 132 (Figure 8). The slide 140 is moved longitudinally to different differential positions upon the depression of one of the keys 130 due to the differing inclinations of notches 142 formed in the upper surface of said slide. The opposite sides of each notch are complementally inclined to cause proper movement of the slide upon depression of a key, regardless of the prior position of said slide, while the bottom of each notch is formed into a. socket adapted to receive the pin 138 to accurately position the slide. The slide 140 is normally maintained in its forward position by a spring 140A tensioned between a stud on plate 132 and a lateral extension on the rearward end of said slide.

The slide 140 is provided at its rearward end with a downward extension 14|, the forward edge of which is adapted to form a stop for a pin 125 on the upper arm of bellcrank lever 120. As shown in Figure 8, the slide and lever are in their zero position and upon depression of any multiplier key 130, slide 140, and extension 14| are moved rearwardly from the zero position a distance corresponding to the value of the depressed key. Bellcrank 120 is rocked in a clockwise direction by means to be hereinafter described, and pin contacts extension 14|, thereby limiting the angular movement of lever 120 to an amount corresponding to the value of the depressed key. Lever 120 and slide 1|0 mounted thereon, together with stepped 'plate 100 cooperating with said slide, form a portion of the multiplier control trip unit which is fully described in the above mentioned patent to Friden, to which reference is hereby made for a full disclosure of such mechanism.

Means are provided for engaging the auxiliary clutch upon depression of a multiplier key. Arranged at the side of slide and directly below pins 138, is a bar which is supported for parallel motion on links 15| and which is normally held in elevated position in contact with pins 138 by the spring 152. Due to the inclination Vof links 15| depression of a key 130 causes a rearward and downward movement of the bar 150 whereby roller 150A mounted on a downward extension of said bar, rocks an arm 154 which is rigidly secured to tubular shaft |23, on which control plate |20 is mounted (Figure 2) in a similar manner. 'Thus it is seen that clockwise movement of arm 154 on depression of a multiplier key, causes corresponding movement of control plate |20 thereby serving to engage the auxiliary clutch |12 in the manner hereinbefore described.

Means are provided whereby the auxiliary clutch sets the multiplier control unit to determine the number of actuations in accordance with the depressed multiplier key. As shown in Figure 8, an arm |91 fast to the shaft |85 is connected by spring 120A with an ear on bellcrank 120, said spring being normally free of tension. Upon clockwise movement of shaft |85 due to the rearward movement of arm |84 and link |83, arm |91 serves to tension spring 120A which then becomes effective to rock bellcrank 120 in a clockwise direction until pin 125 contacts the downward extension 14| of multiplier'slide 140. This tension is maintained throughout the operation due to the latching of arm |84 and link |83 in displaced position by latching member |86. Due to the lost motion between link I2 I and-clutch release bellcrank I I5 the multiplier selection is sei'l into the control unit before the main clutch is engaged. y

During the multiplying operation single tooth gear |89 acting through gear 1|3 advances slide 1I0 step by step as fully disclosed in the above mentioned patent, the advance taking place early in the cycle. During the last cycle of operation, pin 1|I moves plate 100 rearwardly to stop the operation in the following manner. Plate 100, acting against pin 103 on downward extension 135B of latching slide 135, moves the same rearwardly to release the depressed key 130, which thereby permits a return of arm 154, shaft |23, control plate |20, to inoperative position. This action moves roller |25A (Figure 5) away from the forward arm\of lever |88, thus permitting the nose |88A thereof to fall into the path of the vsingle tooth gear |39 to be moved rearwardly by the same to release latch |86 and permit disengagement of the clutch by the bellcrank I I5.

Reversing mechanism control Means are provided for enabling auxiliary clutch operated means for ,setting the reversing gears to subtractive position upon depression of the minus key 220. As previously described, de-

0 pression of key 22o through pin 220B rocks the bellcrank 225, said bellcrank being maintained in its normal position by spring 226 as shown in Figure 2. Secured to the lower end of bellcrank 225 is a link 221 (Figure 2) which is supported at its rearward end by a stud 221A engaging a slot formed therein.

The link 221-is provided with, cam lug 221C (Figures 2 and 6) which normally holds the lower arm of lever 223 to the left as viewed in Figure 6.' The upper arm of said lever 226 contacts the forwardly extending arm 229 of a two-part member 229-229A,holding the same rocked in 'acounter-clockwise position as shown in Figure 6, against the compression of spring 230. Parts 229 and 229A are keyed to a common shaft for simul- A Ytaneous oscillation in a substantially vertical plane, but part 229 is loosely keyed thereto to permit lateral oscillation thereof on said shaft.

The rearward and upwardly extending arm 229A is provided with a cam flange v(Figures`2 and 6) which engages a slot in the shaft |44. One part of the cam flange is oiset from the other so that oscillation of two-part member 22S-229A serves to shift shaft |44 and fork |43 andV reversing pin |34 to reverse the direction of drive of the actuator. The two-part member 229-229A is normally heid in a-position to determine additive rotation of the actuator by spring 23| as shown in Figure 2.

As shown in Figure 6, member 22B- 229A is held in its normal inoperative position by the cam lug 221C on link 221. Upon rearward movement of link 221 compression spring 230 becomes effective to rock the part 229 in a clockwise direction to position a roller 229B on an upward extension of said lever in the path of a cam 232 (Figures '2 and 6) formed integrally with the housing of auxiliary clutch |12. Cam 232 rotating in a clockwise direction contacts roller 229B thereby rocking two-part member 229-229A in.

a counter-clockwise direction whereby the cam V `flange-formed on part 223A becomes effective to ating mechanism. As cam 232 (Figure 2) operates ahead of cam |3| (Figure 54) in the cycle of the auxiliary clutch the 'timing of the setting of the reversing gearing in relation to the engagement of the main clutch is such that the reversing gearing is fully set in subtractive position if such direction of drive is determined before the main clutch is engaged.

Means are provided for setting the reversing gearing to subtractive position upon movement of aA division control member to operative position. For a complete disclosure of suitable division control means reference is hereby made to the British patent to Friden No. 342,044, accepted January 29, 1931. The only part of `such mechanism shown herein is a pin 602B (Figure 2) whichX is secured to a member adapted to be moved rearwardly by `a Ydivision operation initiating member upon movement thereof to operative position. Said pin 602B-is disposed immediately in front of an upward extension 221B on link 221 so that rearward movement of said pin causes similar movement of link 221 to determine operation of .the mechanism adapted to set the reversin'g gearing to subtractive position in the manner described above. It is to be noted that such rearward movement of link 221 through tension 233A on a spring pressed plunger 233 (Figure 2), normally holding the same in depressed position. Upon rearward movement of link 221, a notch 221E permits the plunger 233 to Jmove upwardly under the inuen'ce of compression spring 234, the nose of said plunger impinging against a cam 229C formed on member 229A. When member 229 is rocked in counter-clockwise direction by cam 232, the cam surface 229C-moves from over the plunger 233, allowing the same vto move upwardly under the inuence of spring 234 to a position in front of the forward edge of said cam, thereby holding member 229, shaft |44 and pin |34'in the position to cause subtractive rotation. When the operation control device is released, that is, either the minus key or the division lever, the slide or link 221 moves forwardly under the inuence of spring 226, and again depresses the plunger 233 permitting member 229 to be restored to rits normal position, as

spring 23 I Differential 'mechanism The machine is provided with a plurality of banks of numeral keys, one

shown in Figure 2, by the f f which is shown in g Figure 1, the said numeral eys 3| 5 being suitably mounted in the top plate and being normally'held in raised position by springs, as disclosed in the above mentioned patent which also discloses suitable means for latching a key in depressed position. Each key stem is provided with a cam surface 3| 5A adapted to cooperate with a -pin 3|4A secured to a slide 3| 4 which is.

mounted for longitudinal movement on its supporting bracket by pin and slot connections 3|4B being normally held in rearward position by spring 3|3. The key stems are equally spaced apart, thel spacing thereof being slightly greater than the spacing of pins 3|4A on slide 3|4 so that the cam surfaces 3I5A 0n the various keys are adapted to move the slide 3| 4 differential amounts corresponding to the particular key depressed. A rack 3I4C formed on the lunder side of each slide 3|`4 cooperates with the gear teeth 3i2A on a pivoted stepped plate 3| 2 so that the plate 3'I2 is rocked according to the value of the key depressed-to position the corresponding step thereon in alignment with a lug 308A on a selection lever 308 pivoted at 309.

Pivoted to the selection lever 308 at 308B is member 3|0 which is normally held in the position shown in Figure 1 in which a lateral extension 3|0B thereon is held against the selection lever 308 by a spring 3|0A surrounding an upwardly extending arm of said member 3|0 and compressed between said member and an ear 308C of the selection lever 308. The arrangement is such that when clockwise rotation is imparted to the member 3|0 by means to be hereinafter described, such member, through compression spring 3IOA moves the selection lever 308 upwardly until the lug 308A engages the step of plate 3 I2 which is positioned opposite thereto. During the upward movement of said selection lever 308, rack 301 formed on the rearward end thereof rotates the settable selecting element 305 in a counter-clockwise direction to set a value therein corresponding to the value of the depressed key. Reference is hereby made to the above mentioned patent to Friden for a more detailed description of such selecting mechanism and the manner in which it controls the transferring of values from the actuator 300 to the register mounted in the shiftable register carriage 400.

Means are provided whereby operation of the auxiliary clutch transfers the values set in the keyboard to the selection mechanism., Secured to arm |84 and extending rearwardly therefrom is a link |9| (Figures 4, 5, and l) the rearward end of which is pivotally connected to the upper arm of a lever |92 by shaft |9|A which lies immediately forward`of member 3|0 pivoted to selection lever 308. As previously described, upward movement of member 3|0 about its pivot point compresses spring 3 I 0A which then expands to rock selection lever 308 upwardly until lug 308A thereon engages the aligned step of step plate 3 I2 thereby rotatingv the selection element 305 to set a value therein corresponding to the value of the depressed key in that order. So it is seen that when arm |84 is moved rearwardly by the auxiliary clutch, link I9I and shaft |9IA serve to rock member 3|0, compress spring 3 I 0A, and rock selection lever 308 upwardly to set the selection in the actuating mechanism.

Means are provided for locking the selection mechanism during operation of the machine comprising a locking dog loosely keyed on shaft 84| (Figure 1) and adapted to engage the rack formed on the settable selecting element 305 to prevent movement thereof. The locking mechanism is moved to active position by a linkage operated by the auxiliary clutch, said linkage being provided with a lost motion connection so that the values are set into the actuator before the selection lock becomes effective. For this purpose locking dogs 840 are provided with keys extending into a wider spline of shaft 84|, the arrangement being such that the shaft may be rocked some distance in a counter-clockwise direction before the keys of the dogs are picked up. Arm |94 (Figure 1) fast on shaft 84| is connected by a link l 93 with the lower arm of lever |92 which is rocked by the auxiliary clutch in the manner described above.

The arrangement is such that rearward movement of link |9| causes, through lever |92, forward movement of link |93 and a delayed counterclockwise oscillation of locking dogs 840 into engagement with the rack formed on selecting element 305 thereby locking the selecting element in position, such locking engagement being maintained until the release of arm |84 at the conclusion of the operation. The lost motion between locking dogs 840 and shaft 84| is provided to allow time for the setting of the selection in the actuator by movement of selection lever 308 before the locking dogs 840 are rocked into engagement with the rack of selecting element 305.

Registering mechanism y Reference is made to the above mentioned patent to Friden, Number 1,643,710 for a complete disclosure of suitable registering mechanism. For the purposes of the instant invention it is suflicient to understand that the registering mechanism carriage 400 is slidably mounted in suitable guides in the frame of the machine and is capable of displacement to a plurality of ordinal positions to receive actuation by the actuating mechanism 300. Means are provided for locking the registering carriage 400 in position during the actuation. Such means comprises a rack 40| (Figure 1) secured to the rear of said carriage, said rack being notched to receive a locking member 598 which is pivoted on the actuator shaft and is normally held out of engagement with said rack by spring 598A.

Means are provided for engaging a locking member for the shiftable carriage upon operation of the auxiliary clutch. As shown in Figure 1, an arm |96 is secured to the shaft 84| near the right end thereof as viewed from the front of the machine. Said arm |96 is provided with a pin |96A which lies immediately forward oi' downwardly extending tail 598B of locking lever 598 so that the auxiliary clutch-acting through link I 83, arm |84, link |9|, link |93, arm |94, shaft 84|, and arm |96, rocks said locking lever 598 in a clockwise direction so that the upper end thereof moves into engagement with the rack 40| on the carriage, thereby preventing lateral displacement thereof during operation of the machine.

`VI claim:

1. In a motor driven calculating machine, actuating mechanism, a clutch between said motor and said actuating mechanism, an auxiliary clutch, means controlled by said auxiliary clutch for deterrnining engagement of said first named clutch, spring means for effecting disengagement of said first named clutch means for restraining said last named means to prevent operation thereof, and means for tripping said restraining means and returning said engagement determining means to inactive position.

2. In a motor driven calculating machine, actuating mechanism, a clutch between said motor and said actuating mechanism, an auxiliary clutch, manually operable controlling means therefor, means controlled by said auxiliary clutch for determining engagement of said rst named clutch,`spring means for preventing disengagement of said first named clutch means for restraining said last named means to prevent operation thereof, and means controlled by said manually operable means for disabling said restraining means.

3. In a motor driven calculating machine, actuating mechanism, transmissionA mechanism including a clutch and reversing means, power operated means including an auxiliary clutch for positioning said reversing means and engaging said first named clutch, and manually operable means for determining operation of said auxiliary clutch.

4. In a motor driven calculating machine, actuating mechanism, transmission mechanism including a clutch and reversing means, an auxiliary clutch, normally disabled means controlled by said auxiliary clutch for positioning said reversing means, means controlled by said auxiliary clutch for engaging said first named clutch, control means for initiating negative actuation, and means controlled thereby for enabling said positioning means and engaging said auxiliary clutch.

5. In a motor driven calculating machine, actuating mechanism and selecting mechanism therefor, driving means for said actuating mechanism including a clutch, means for introducing values finto the machine, means for initiating operation of the machine including an auxiliary clutch, and means controlled thereby for transferring the values to the selecting/mechanism and engaging the first named clutch Vseriatim.

6. In a motor driven calculating machine, actuating mechanism and selecting mechanism therefor, driving means for said actuating mechanism including a` clutch, means for introducing values into the machine, means for initiating operation of the machine including an auxiliary clutch, means for transferring the ,values to the selecting mechanism, means for locking the selecting mechanism in set position, and means controlled by the auxiliary clutch for operating the transferring means and the locking means and for engaging the rst named clutch seriatim.

7. In a motor driven calculating machine, actuating mechanism and selecting mechanism therefor, a reversible transmission including a clutch vand reversing means, means for introducing values into the machine, means for initiating operation of the machine including an auxiliary clutch, and means controlled thereby for transferring the values to the selecting mechanism, positioning said reversing means and thereafter engaging said -rst named clutch.

8. In a motor driven calculating machine, actuating mechanism and selecting mechanism therefor, a main clutch for connecting said actuating mechanism to the motor means for introducing values into the machine, means for initiating operation of the main clutch including an auxiliary clutch, and means controlled thereby for transferring the values to the selecting mechanism.

9. In a motor driven calculating machine, actuating mechanism and selecting mechanism therefor, a main clutch for connecting said actuating mechanism to the motor means for introducing values into the machine, means for initiating operation of the main clutch including an auxiliary clutch, means for transferring the values to the selecting mechanism, means for locking the selecting mechanism in set position, and means controlled by the auxiliary clutch for operating the transferring means and locking means seriatim. V

10. In a motor driven calculating machine, actuating mechanism and selecting mechanism therefor, driving means for said actuating mechanism including a clutch, means' for introducing values into the machine, means for transferring the values to the selecting mechanism, means for locking the selecting mechanism in set position,

and auxiliary power driven means operable before llocking said carriage against movement, auxiliary power driven means for initiating operation of the machine, and means operable thereby for operating said locking means and said clutch engaging means seriatim.

12. In a motor driven calculating machine having a displaceable carriage, actuating mechanism and driving means therefor including a clutch and clutch engaging means, means for locking said carriage against movement, means for initiating operation of the machine including an auxiliary clutch, and means controlled by said auxiliary clutch for operating said locking means.

13. In a motor driven calculating machine having a displaceable carriage, actuating mechanism and driving means therefor including a clutch and clutch engaging means, normally inactive means for locking said carriage against movement, means for initiating operation of the machine including an auxiliary clutch, means controlled by said auxiliary clutch for operating said locking'means, and means for latching said locking means in active position.

14. In a motor driven calculating machine having a displaceable carriage, actuating mechanism and driving means therefor including a clutch and 'clutch engaging means, normally inactive means for locking said carriage against movement, means for initiating operation of the machine including an auxiliary clutch, means controlled by said auxiliary clutch for operating said locking means, means for latching said locking means in active position, and means for disabling said latching means at the end of the operation.

15. In a motor driven calculating machine, actuating mechanism and driving means therefor including a clutch, an auxiliary clutch, multiplier control mechanism vincluding value introducing means and selecting mechanism, means responsive to operation of said value introducing means for engaging said auxiliary clutch, and means sented by the manipulated key into the selecting mechanism.

17. In a motor Adriven calculating machine, actuating mechanism and driving means therefor including a clutch and clutch control means, an auxiliary clutch, multiplier control mechanism comprising value introducing means and selecting mechanism, means controlled by said value introducing means for engaging said auxiliary clutch, and means controlled by said auxiliary clutch for transferring the value to'the selecting mechanism and operating said clutch control means "seriatim.

18. In a'motor driven calculating machine, r'ultiplier controlmechanism comprising value introducing means and selecting mechanism, power driven means, means controlled by said multiplier control for mechanism initiating operation of said power driven means, and means operable by said power driven means for transferring the multiplier value to the selecting mechanism.

19. In a motor driven calculating machine having multiplicand and multiplier selecting mechanisms, means for introducing a multiplicand value, means for introducing a multiplier value, a power driven member, means controlled by said multiplier value introducing means for initiating operation of the drive for said power driven element, and means controlled by said element for transferring the introduced multiplicand and multiplier values to the associated selecting mechanisms. v

20. In a motor driven calculating machine, actuating mechanism, driving means therefor including a cyclic clutch, an auxiliary clutch for determining engagement of said cyclic clutch, a manually operable control member, means responsive to movement thereof to operative position for engaging said auxiliary clutch, and means responsive to movement thereof to inoperative position for disengaging said cyclic clutch at a predetermined cyclic position thereof.

21. In a motor driven calculating machine, actuating mechanism, a main clutch between said motor and said actuating mechanism, an auxiliary clutch, means controlled by said auxiliary clutch for determining engagement of said main clutch, spring means for effecting disengagement of said first named clutch means for latching said last-named means to prevent operation thereof and maintain said main clutch in operation, and means for tripping said latching means to permit disengagement of said main clutch.

22. In a motor driven calculating machine, actuating mechanism, a main clutch between said motor and said actuating mechanism, an auxiliary clutch, means controlled by said auxiliary clutch for determining engagement of said main clutch, spring means for effecting disengagement of said first named clutch means for latching said last-named means to prevent operation thereof, means operated by said motor for tripping said latching means to effect disengagement of said main clutch.

23. In a motor driven calculating machine, actuating mechanism, a main clutch between said motor and said actuating mechanism, an auxiliary clutch, means controlled by said auxiliary clutch for determining engagement of said main clutch, spring means for effecting disengagement of said first named clutch means for latching said last-named means to prevent operation thereof and to maintain said main'clutch in operation, and means for disengaging said auxiliary clutch while said main clutch is thus maintained in operation. Y

24. In a motor driven calculating machine, actuating mechanism, a main clutch between said motor and said actuating mechanism, an auxiliary clutch, normally inactive means controlled by said auxiliary clutch for determining engagement of said main clutch, spring means for effecting disengagement of said main clutch means for latching said last-named means to prevent operation thereof and to maintain said main clutch in operation, means for disengaging said auxiliary clutch while said main clutch is thus maintained in operation, and separate means for tripping said latching means to effect disengagement of said main clutch.

25. In a motor driven calculating machine,

vactuating mechanism, a main clutch between said motor and said actuating mechanism,l an auxiliary clutch, normally inactive means con, trolled by said auxiliary clutch for determining engagement of said main clutch, spring means for eifecting disengagement of said main clutch means for latching said last-named means to prevent operation thereof and to maintain said main clutch in operation, means for disengaging said auxiliary clutch while said main clutch is thus maintained in operation, and separate means operated by said motor for tripping said latching means to eect disengagement of said main clutch.

26. In a motor driven calculating machine, actuating mechanism, a cyclic main clutch between said motor and said actuating mechanism, an auxiliary clutch, means normally effective to maintain said main clutch disengaged and controlled by said auxiliary clutch to effect engagement of said main clutch, means for latching said last named means in active position to maintain said main clutch in operation, and

means selectively operable duringV the first or any subsequent cycle of operation of said main clutch for tripping said latching means whereby disengagement of said main clutch will be effected when said clutch next reaches a predetermined cyclic position.

27. In a motor driven calculating machine,

actuating mechanism, a cyclic main clutch betw'een said motor and said actuating mechanism, an auxiliary clutch, means normally effective to maintain said main clutch disengaged and controlled by said auxiliary clutch to effect engagement of said main clutch, means for latching said last named means in active position to maintain said main clutch in operation, means operated by said motor for tripping said latching means whereby disengagement of said main clutch will be effected when said clutch next reaches a predetermined cyclic position, andselective control devices for rendering said tripping means effective during the first or any subsequent cycle of operation of said main clutch.

' GUSTAV LERCH.

CERTIFCATE OF CORRECTION. Patent No. 2,1ll8,760. February 28, 1959.

GUSTAV IERCH lt is hereby certified that error appears in the printed secification ofthe above numberedpatent requiring correction as follows: Page 7, first column, line 2, claim 18, for the words "for mechanism read mechanism for; page 7, first column, line 58, and second column, ylines 9 and 25, claims 25, 2h. and 25 respectively, strike out the word to"; and that the said Letters Patent should be read. with this correction therein that the same may conform to the record of the casein the Patent Office.

Signed and sealed this 25rd day of May, A.D. 1959.

Henry Van Arsdale (Seal) Acting Commissioner of Patents.

CERTIFICATE OF CORRECTION. Patent No. 2,1h8,760. -February 28, 1959.

GUSTAV IERCH It is hereby certified that error* appears in the printed specification of the above numbered patent requiring' correction as follows: Page 7, first column, line 2, claim 18, for the words "for mechanism read mechanism for; page 7, first column, line 58, and second column, llines 9 and 25, claims 23, 214. and 25 respectively, strike out the word "to"; and that the said i Letters Patent should be read with this correction therein that the same l may conform to the record of the case in the Patent Office.

Signed and sealed this 25rd day of May, A.D. 1,959.

Henry Van Arsdale (Seal) Acting Commissioner of Patents. 2 

